* Cytoplasm: The first stage of respiration, called glycolysis, takes place in the cytoplasm. This is where glucose is broken down into pyruvate.

* Mitochondria: The subsequent stages of respiration (Krebs cycle and electron transport chain) occur within the mitochondria, specifically:

* Krebs cycle: Occurs in the matrix of the mitochondria.

* Electron transport chain: Takes place on the inner membrane of the mitochondria.

Let me know if you'd like a more detailed explanation of each stage!